what are the options??
please include all of your question
Answer:
Alloy, metallic substance composed of two or more elements, as either a compound or a solution. The components of alloys are ordinarily themselves metals, though carbon, a nonmetal, is an essential constituent of steel.
Explanation:
Alloys are usually produced by melting the mixture of ingredients. The value of alloys was discovered in very ancient times; brass (copper and zinc) and bronze (copper and tin) were especially important. Today, the most important are the alloy steels, broadly defined as steels containing significant amounts of elements other than iron and carbon. The principal alloying elements for steel are chromium, nickel, manganese, molybdenum, silicon, tungsten, vanadium, and boron have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in coinage. The distinction between an alloying metal and an impurity is sometimes subtle; in aluminum, for example, silicon may be considered an impurity or a valuable component, depending on the application, because silicon adds strength though it reduces corrosion resistance.
Answer: 75 mph
Explanation:
The Relative Speed for a mobile is equal to the diference between the object and the observer:
Relative Speed (Rs) = Object's Velocity - Observer's Velocity
Thinking on those terms, we would need to have a universal observer to do any understandable measurement on daily basics. This is why we all use earth as a Static Observer for every measurement we do everyday.
Using Earth as an observer, the Velocity for the Patrolman is:
Patrolman Velocity (Vp) = 60 mph
Because the radar gun does measure the Relative Speed for the object, which is 135 mph, we need to work with the equation to find the Velocity using Earth as a reference.
Object's Relative Velocity = Object's Velocity - Patrolman's Velocity
Object's Velocity = Object's Relative Velocity + Patrolman's Velocity
We need to keep in mind, the Patrolman is going on the opposite direction. Because of this the sign for his velocity should be negative.
Object's Velocity = 135 mph + ( -60 mph)
Object's Velocity = 135 mph - 60 mph
Object's Velocity = 75 mph
Melting: as mantle material rise toward the divergent plate boundary the pressure is reduced which causes melting
